AK5366 Datasheet, PDF (26/43 Pages) Asahi Kasei Microsystems – 24 BIT 48KHZ ADC WITH SELECTOR/PGA /ALC

ASAHI KASEI
[AK5366]
(2) ALC=ON
Figure 11 and 12 show the level diagram example at ALC=ON. In Figure 11, Input ATT is −12dB and REF7-0 bits are
“8CH”.
Input
4Vrms
ATT
ALC
-12dB
ADC
-12dB
2Vrms
-12dB
1Vrms
0.5Vrms
-12dB
-0.5dB
+5.5dB
+6dB
0dBFS
-0.5dBFS
-6dBFS
0.25Vrms
-12dBFS
Figure 11. ALC Level diagram example (ALC=ON, LMTH bit=“0”)
In Figure 12, Input ATT is −6dB and REF7-0 bits are “8CH”.
Input
2Vrms
ATT
ALC
ADC
-6dB
-6dB
1Vrms
0.5Vrms
-6dB
-0.5dB
+5.5dB
0dBFS
-0.5dBFS
-6dBFS
-6dB
+6dB
0.25Vrms
-12dBFS
Figure 12. ALC Level diagram example (ALC=ON, LMTH=“0”)
MS0309-E-00
- 26 -
2004/05